Maple

A grade

{ 1, 2, 3, 14, 15, 16, 17, 19, 20, 21, 22, 27 }

B grade

{ 5, 6 }

C grade

{ }

F normal fail

{ 4, 7, 8, 9, 10, 11, 12, 13, 18, 23, 24, 25, 26, 28 }

F(-1) timedout fail

{ }

F(-2) exception fail

{ }